That may be one of the more brazen assertions of the GB's indispensability compared tp the "mere" Bible, but that notion of putting greater importance on the modern channel than on "God's Word" is not new - and harks back to the hubristic claims of their white-bearded founder, Chuck Russell.
Others will know the exact quote I am recalling: Russell intoned that 'It would be better to rely on the writings of the Watchtower Society alone than to read the Bible alone' (that Russell was the chief author of the Watchtower points to the level of hubris at work in his claim).
High claims warrant high scrutiny - but even a cursory review of Russell's many claims show what a stupid charlatan he was.
Similarly, as time passes and claims of exclusivity of "truth" dispensing evaporate under scrutiny, we are reminded of the crazy ease with which men bolster their stinky words with modern-day equivalents of "Thus saith the Lord" assertions. Go stink up the air elsewhere guys.
Let the aisles start rolling with laughter to match those of the masses who have already left this typical man-made religion that inspires, not respect, but derision.